Safety closure device
CA 1138298 A · Owner: Tulcea S.A. · Inventors: Staempfli, Jackie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A safety closure device is described for use in a distribution system for fluid under pressure. The device comprises a conduit adapted to be inserted into the system and a piston displaceable relative to the conduit capable in, an end position, of closing off flow through the conduit and, in another positon of providing a flow duct for fluid. Means are provided for adjusting the flow duct section to establish a normal fluid pressure difference upstream and downstream of the piston and for maintaining this equilibrium to a threshold value of the difference. Exceeding the threshold value causes displacement of the piston to close the conduit.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.